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15.3.8 +CREG Network registration
Format Description
+CREG: <stat>[,<lac>,<cid>]
When +CREG=1: given when <stat> value changes; given after NO
CARRIER if network lost when online
When +CREG=2: given when <stat> value changes and when
network cell (<lac> and <cid>) of the ME changes; given after NO
CARRIER if network lost when online
The +CREG result code is enabled and disabled with the +CREG command.
Defined values
<stat>:
0 Not registered, the ME is not currently searching for a new operator to register with
1 Registered,
home
network
2 Not registered, but ME is currently searching a new operator to register with
3 Registration
denied
4 Unknown
5 Registered,
roaming
<lac>
string type, two-byte location area code in hexadecimal format (e.g. "00C3"
equals 193 in decimal)
<ci>
string type, two-byte cell ID in hexadecimal format
15.3.9 +CUSD Network-initiated unstructured supplementary service data
Format Description
+CUSD: <m>,<str>,<dcs>
Given when +CUSD=1 and network-initiated ‘notify’ or ‘request’ USSD
message received; discarded if in the online data state
This result code is enabled and disabled with the +CUSD command.
NOTE: only the first ‘request’ message during a network-initiated USSD session yields to the
+CUSD unsolicited result code. The rest are information responses to the +CUSD command.
Defined values
<m>:
0
No further user action required (network-initiated USSD-Notify, or
no further information needed after mobile-initiated operation)
